"use strict";

// opts.addWorker(worker)
// opts.approveDomains(options, certs, cb)
module.exports.create = function(opts) {
    opts = opts || {};
    opts._workers = [];
    opts.webrootPath = opts.webrootPath || require("os").tmpdir() + require("path").sep + "acme-challenge";
    if (!opts.greenlock) {
        opts.greenlock = require("greenlock").create(opts);
    }
    if ("function" !== typeof opts.approveDomains) {
        throw new Error("You must provide opts.approveDomains(domain, certs, callback) to approve certificates");
    }

    function log(debug) {
        if (!debug) {
            return;
        }

        var args = Array.prototype.slice.call(arguments);
        args.shift();
        args.unshift("[le/lib/core.js]");
        console.log.apply(console, args);
    }

    opts.addWorker = function(worker) {
        opts._workers.push(worker);

        worker.on("online", function() {
            log(opts.debug, "worker is up");
        });

        worker.on("message", function(msg) {
            log(opts.debug, "Message from worker " + worker.id);
            if ("LE_REQUEST" !== (msg && msg.type)) {
                log(opts.debug, "Ignoring irrelevant message");
                log(opts.debug, msg);
                return;
            }

            log(opts.debug, "about to approveDomains");
            opts.approveDomains(msg.options, msg.certs, function(err, results) {
                if (err) {
                    log(opts.debug, "Approval got ERROR", err.stack || err);
                    worker.send({
                        type: "LE_RESPONSE",
                        domain: msg.domain,
                        error: { message: err.message, code: err.code, stack: err.stack }
                    });
                    return;
                }

                var promise;

                //
                /*
        var certs = require('localhost.example.com-certificates').merge({
          subject: msg.domain
        , altnames: [ msg.domain ]
        , issuedAt: Date.now()
        , expiresAt: Date.now() + (90 * 24 * 60 * 60 * 1000)
        });
        certs.privkey = certs.key.toString('ascii');
        certs.cert = certs.cert.toString('ascii');
        certs.chain = '';
        worker.send({ type: 'LE_RESPONSE', domain: msg.domain, certs: certs });
        return;
        // */

                if (results.certs) {
                    promise = opts.greenlock.renew(results.options, results.certs);
                } else {
                    promise = opts.greenlock.register(results.options);
                }

                promise.then(
                    function(certs) {
                        log(opts.debug, "Approval got certs", certs);
                        // certs = { subject, domains, issuedAt, expiresAt, privkey, cert, chain };
                        opts._workers.forEach(function(w) {
                            w.send({ type: "LE_RESPONSE", domain: msg.domain, certs: certs });
                        });
                    },
                    function(err) {
                        log(opts.debug, "Approval got ERROR", err.stack || err);
                        worker.send({ type: "LE_RESPONSE", domain: msg.domain, error: err });
                    }
                );
            });
        });
    };

    return opts;
};